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[p5sagit/p5-mst-13.2.git] / ext / threads / t / problems.t

use strict;
use warnings;

BEGIN {
    if ($ENV{'PERL_CORE'}){
        chdir 't';
        unshift @INC, '../lib';
    }
    use Config;
    unless ($Config{'useithreads'}) {
	print "1..0 # Skip: no useithreads\n";
 	exit 0;	
    }
}

use ExtUtils::testlib;

BEGIN {
    $| = 1;
    if ($] == 5.008) {
        print("1..11\n");   ### Number of tests that will be run ###
    } else {
        print("1..15\n");   ### Number of tests that will be run ###
    }
};

use threads;
use threads::shared;
print("ok 1 - Loaded\n");

### Start of Testing ###

no warnings 'deprecated';       # Suppress warnings related to :unique

use Hash::Util 'lock_keys';

# Note that we can't use  Test::More here, as we would need to
# call is() from within the DESTROY() function at global destruction time,
# and parts of Test::* may have already been freed by then

my $test : shared = 2;

sub is($$$) {
    my ($got, $want, $desc) = @_;
    lock($test);
    unless ($got eq $want) {
	print "# EXPECTED: $want\n";
	print "# GOT:      $got\n";
	print "not ";
    }
    print "ok $test - $desc\n";
    $test++;
}


#
# This tests for too much destruction
# which was caused by cloning stashes
# on join which led to double the dataspace
#
#########################
if ($] != 5.008)
{ 
    sub Foo::DESTROY { 
	my $self = shift;
	my ($package, $file, $line) = caller;
	is(threads->tid(),$self->{tid},
		"In destroy[$self->{tid}] it should be correct too" )
    }
    my $foo;
    $foo = bless {tid => 0}, 'Foo';			  
    my $bar = threads->create(sub { 
	is(threads->tid(),1, "And tid be 1 here");
	$foo->{tid} = 1;
	return $foo;
    })->join();
    $bar->{tid} = 0;
}

#
# This tests whether we can call Config::myconfig after threads have been
# started (interpreter cloned).  5.8.1 and 5.8.2 contained a bug that would
# disallow that too be done, because an attempt was made to change a variable
# with the : unique attribute.
#
#########################
{
    lock($test);
    if ($] == 5.008 || $] >= 5.008003) {
        threads->create( sub {1} )->join;
        my $not = eval { Config::myconfig() } ? '' : 'not ';
        print "${not}ok $test - Are we able to call Config::myconfig after clone\n";
    } else {
        print "ok $test # Skip Are we able to call Config::myconfig after clone\n";
    }
    $test++;
}

# bugid 24383 - :unique hashes weren't being made readonly on interpreter
# clone; check that they are.

our $unique_scalar : unique;
our @unique_array : unique;
our %unique_hash : unique;
threads->create(
    sub {
        lock($test);
	my $TODO = ":unique needs to be re-implemented in a non-broken way";
	eval { $unique_scalar = 1 };
	print $@ =~ /read-only/
	  ? '' : 'not ', "ok $test # TODO $TODO unique_scalar\n";
	$test++;
	eval { $unique_array[0] = 1 };
	print $@ =~ /read-only/
	  ? '' : 'not ', "ok $test # TODO $TODO - unique_array\n";
	$test++;
        if ($] >= 5.008003 && $^O ne 'MSWin32') {
            eval { $unique_hash{abc} = 1 };
            print $@ =~ /disallowed/
              ? '' : 'not ', "ok $test # TODO $TODO - unique_hash\n";
        } else {
            print("ok $test # Skip $TODO - unique_hash\n");
        }
	$test++;
    }
)->join;

# bugid #24940 :unique should fail on my and sub declarations

for my $decl ('my $x : unique', 'sub foo : unique') {
    {
        lock($test);
        if ($] >= 5.008005) {
            eval $decl;
            print $@ =~ /^The 'unique' attribute may only be applied to 'our' variables/
                    ? '' : 'not ', "ok $test - $decl\n";
        } else {
            print("ok $test # Skip $decl\n");
        }
        $test++;
    }
}


# Returing a closure from a thread caused problems. If the last index in
# the anon sub's pad wasn't for a lexical, then a core dump could occur.
# Otherwise, there might be leaked scalars.

# XXX DAPM 9-Jan-04 - backed this out for now - returning a closure from a
# thread seems to crash win32

# sub f {
#     my $x = "foo";
#     sub { $x."bar" };
# }
# 
# my $string = threads->create(\&f)->join->();
# print $string eq 'foobar' ?  '' : 'not ', "ok $test - returning closure\n";
# $test++;


# Nothing is checking that total keys gets cloned correctly.

my %h = (1,2,3,4);
is (keys %h, 2, "keys correct in parent");

my $child = threads->create(sub { return scalar keys %h })->join;
is ($child, 2, "keys correct in child");

lock_keys (%h);
delete $h{1};

is (keys %h, 1, "keys correct in parent with restricted hash");

$child = threads->create(sub { return scalar keys %h })->join;
is ($child, 1, "keys correct in child with restricted hash");

1;